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Isomerization of paraffins under conditions of aromatization on an alumina-chromium-potassium oxide catalyst

Rozengart, M.I. / Isagulyants, G.V. / Dubinskii, Yu.G. / Kovalenko, L.I. / Bryukhanov, V.G.

Abstract 1. 1. It was shown by a kinetic isotope method that during aromatization of n-hexane and n-hexenes on an alumina-chromium-potassium oxide catalyst at 530° isohexadienes are formed by skeletal isomerization of these hydrocarbons. Isomerization of n-hexane may also take place before dehydrogenation to olefin. 2. 2. It was found that rates of skeletal isomerization of n-hexane and n-hexenes under conditions of aromatization are much lower (by one order of magnitude and more) than corresponding rates of dehydrogenation. 3. 3. An assumption was put forward that skeletal isomerization of paraffins and olefins on an alumina-chromium-potassium oxide catalyst takes place by a sole mechanism via alkyl or alkylene intermediate surface forms with a positive charge.

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Isomerization of paraffins under conditions of aromatization on an alumina-chromium-potassium oxide catalyst

Rozengart, M.I. / Isagulyants, G.V. / Dubinskii, Yu.G. / Kovalenko, L.I. / Bryukhanov, V.G.

Abstract 1. 1. It was shown by a kinetic isotope method that during aromatization of n-hexane and n-hexenes on an alumina-chromium-potassium oxide catalyst at 530° isohexadienes are formed by skeletal isomerization of these hydrocarbons. Isomerization of n-hexane may also take place before dehydrogenation to olefin. 2. 2. It was found that rates of skeletal isomerization of n-hexane and n-hexenes under conditions of aromatization are much lower (by one order of magnitude and more) than corresponding rates of dehydrogenation. 3. 3. An assumption was put forward that skeletal isomerization of paraffins and olefins on an alumina-chromium-potassium oxide catalyst takes place by a sole mechanism via alkyl or alkylene intermediate surface forms with a positive charge.

Isomerization of paraffins under conditions of aromatization on an alumina-chromium-potassium oxide catalyst

Rozengart, M.I. / Isagulyants, G.V. / Dubinskii, Yu.G. / Kovalenko, L.I. / Bryukhanov, V.G.

Abstract 1. 1. It was shown by a kinetic isotope method that during aromatization of n-hexane and n-hexenes on an alumina-chromium-potassium oxide catalyst at 530° isohexadienes are formed by skeletal isomerization of these hydrocarbons. Isomerization of n-hexane may also take place before dehydrogenation to olefin. 2. 2. It was found that rates of skeletal isomerization of n-hexane and n-hexenes under conditions of aromatization are much lower (by one order of magnitude and more) than corresponding rates of dehydrogenation. 3. 3. An assumption was put forward that skeletal isomerization of paraffins and olefins on an alumina-chromium-potassium oxide catalyst takes place by a sole mechanism via alkyl or alkylene intermediate surface forms with a positive charge.

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Title:

Isomerization of paraffins under conditions of aromatization on an alumina-chromium-potassium oxide catalyst

Contributors:

Rozengart, M.I. (author) / Isagulyants, G.V. (author) / Dubinskii, Yu.G. (author) / Kovalenko, L.I. (author) / Bryukhanov, V.G. (author)

Published in:

Petroleum Chemistry: USSR (English Translation of Neftekhimiya) ; 16 ; 36-42

Publication date:

1975-07-07

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/0031-6458(76)90049-6

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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